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Non-organic seeds, Untreated seeds, F1 hybrid, coated seeds
Brassicaceae
Garden vegetables seeds
Untreated ‘Sibsey’ F1 mini broccoli
Brassica oleracea var. italica
Product code : 65-1496-01N
Untreated ‘Sibsey’ F1 mini broccoli has confirmed characteristics that help you plan its placement and cultivation. Untreated ‘Sibsey’ F1 mini broccoli is a garden vegetables variety offered as seed for gardeners who want clear, practical product information. Confirmed details include height: Approximately 45 to 75 cm depending on conditions, spread: Approximately 30 to 45 cm. The packet contains approximately 75 seeds, and the formulation is non-organic seeds, untreated seeds, f1 hybrid, coated seeds. For best results, follow the sowing, light, and spacing information associated with this variety. You can adjust care to your soil, weather, and observed growth without exceeding the plant’s actual needs.
- Quantity
- Approximately 75 seeds per packet
- Exposure
- Full sun
- Life cycle
- Annual
Discover the plant
Common nameUntreated ‘Sibsey’ F1 mini broccoli
FamilyBrassicaceae
GenusBrassica
Speciesoleracea var. italica
CultivarSibsey F1
TypeNon-organic seeds, Untreated seeds, F1 hybrid, coated seeds
Botanical nameBrassica oleracea var. italica
Untreated ‘Sibsey’ F1 mini broccoli (Brassica oleracea var. italica) is an extra-early, long-yielding variety with dark-green stems. It begins like regular crown broccoli with a firm, tight, semi-domed head. After the first cut, numerous tender, tasty side shoots continue to appear over an extended period. The variety tolerates warm-temperature bolting and suits spring, summer, and fall harvests. W.H. Perron packet 65-1496-01N contains approximately 75 untreated F1 hybrid seeds. The product is not advertised as organic. Official maturity is 85 days after sowing, providing a clear planning point for the initial crown.
Start indoors four to five weeks before the last frost, or direct-sow in the garden in early May. Place seed approximately 6 mm deep in clean mix and maintain even moisture. Harden seedlings before setting them out seven to ten days after the last ground frost. Broccoli prefers loose, well-prepared, organic-rich soil that holds moisture without becoming waterlogged. Space plants 30 to 45 cm apart and rows 45 to 60 cm apart. Choose full sun, mulch after establishment, and provide measured nitrogen to support rapid development without imbalance. Keep seedlings protected from abrupt heat, wind, and root disturbance during establishment.
Harvest the main crown as soon as it is firm and tight, before buds open. Cut low enough on the stalk with a clean knife to encourage secondary shoots. Inspect plants every two or three days afterward and pick young side stems to extend production. Maintain irrigation during heat and rotate brassica crops to limit disease. W.H. Perron lists dill, beet, cucumber, pickling cucumber, strawberry, mint, oregano, rosemary, and thyme as companions; keep sage, tomato, and zucchini away. Cool heads promptly, wash just before use, and use damaged shoots first. Record first-crown and side-shoot harvest dates to evaluate the full yield period.
Sowing guide
It all startswith a seed.
Sowing depth
Approximately 6 mm
Spacing / density
Plants 30–45 cm apart; rows 45–60 cm apart
Germination temperature
18 to 24°C
Germination time
5 to 10 days depending on temperature
Sowing period
Indoors 4 to 5 weeks before last frost; direct sowing in early May; successions possible for spring, summer, and fall
Propagation
Seed
Growing method
Start indoors four to five weeks before the last frost in clean, drained mix, approximately 6 mm deep. Keep moist and provide bright light after emergence. Harden plants gradually, then transplant seven to ten days after the last ground frost. Direct sowing in early May is also possible. Prepare loose, organic-rich soil that holds moisture. Space plants 30 to 45 cm apart and rows 45 to 60 cm apart in full sun. Water regularly, mulch, and use nitrogen-containing fertilizer according to soil needs. Monitor caterpillars and disease promptly. Harvest the firm crown before buds open, cut low, then pick side shoots every two or three days. Rotate brassicas and remove diseased debris. Label successions and record the first-crown date separately from later shoots. Watch buds closely as 85 days approaches because a head may loosen quickly in heat. Cut with a sanitized knife and cool the harvest. After cutting, water at soil level and keep mulch away from the stem. Guide shoots outward for airflow and access. If a plant shows unusual wilt or rot, remove it with its debris. Weigh crown and secondary shoots separately. Continue inspections until production stops, then clean tools and document total yield from every succession.
Soil and care
The right care,at the right time.
Soil pH
6.0 to 7.5
Minimum temperature
Hardened seedlings tolerate light frost; avoid severe freezes
Care level
Moderate
Watering
Maintain even moisture from sowing through the final side shoots. Water deeply at soil level when the surface begins to dry, especially during heat and head formation. Water stress may reduce crown size and speed bud opening. Avoid standing water and wet foliage in the evening. Mulch limits evaporation and stabilizes soil. Check moisture beneath mulch before every application, then record rainfall to prevent excessive automatic irrigation. Continue regular water after the first cut so secondary shoots remain tender.
Soil type
Sibsey prefers deep, loose, fertile soil enriched with mature organic matter. Drainage should be effective while retaining consistent moisture during rapid growth. Incorporate well-decomposed compost before planting and avoid working waterlogged ground. Moderate nitrogen supports foliage and continued side-shoot production, but excess feeding can unbalance growth. Apply mulch after establishment to stabilize moisture and limit weeds. Maintain a workable soil structure around roots and avoid repeated cultivation that may damage the shallow feeder-root system.
Fertilization
Incorporate mature compost before planting. Rapidly growing broccoli responds to nitrogen, but apply it according to a soil test or product directions. Balanced feeding at establishment followed by a light application after establishment or the first cut may support regrowth. Keep fertilizer away from stems, water after application, and do not feed dry or saturated soil. Excess nitrogen produces excessive leaves and may delay the head. Record every application to prevent duplication and compare response among successions.
Moisture
Consistent, especially after transplanting and during head formation
Seasonal care
In spring, prepare soil and start seed four to five weeks before the last frost. Harden plants, transplant after frost, and protect temporarily from wind or insects with mesh. Remove protection that compresses foliage. In early summer, mulch, water regularly, and inspect leaf undersides. Weed shallowly and support leaning plants without tightening stems. Harvest the first crown as soon as it is firm. Through summer and fall, continue watering and pick side shoots frequently to keep them tender. Remove opened or yellowing buds. After the final harvest, pull plants, discard diseased tissue, and clean tools. Do not immediately plant another brassica in the same place. Record sowing, transplanting, crown, and last-shoot dates to measure the full yield period. Store clean mesh dry before reuse. After every cut, inspect the wound and avoid watering it directly. Collect yellow leaves that block airflow without removing healthy foliage. During heat, increase moisture checks. In fall, protect the last shoots briefly only while quality remains good. Weigh every harvest in a clean crate and add secondary shoots to the crown total. Before winter, confirm mulch and diseased roots are removed and write down the next family planned in rotation. Review insect notes and replace damaged mesh before storing it dry. Also record losses, likely causes, actual weather, and any intervention so later successions can be compared fairly.
Container growing
A garden,within reach.
Recommended pot size
25 to 35 L minimum for one plant
Use a container of at least 25 to 35 L, deep and fitted with several holes, for one plant. Fill it with rich, loose, draining mix and place in full sun. Transplant without burying the crown and leave room around foliage. Water deeply as the surface dries and check daily during heat. Fertilize moderately with balanced feed that includes nitrogen. Inspect leaf undersides and protect with mesh without blocking airflow. Cut the firm crown with a clean knife, then continue care for side shoots. Rotate the pot when light is uneven, empty the saucer after rain, and support the plant if it becomes heavy. After the season, remove roots and clean the container before growing another plant family. Label first and later harvests separately. After the first cut, add a thin layer of mature compost without touching the stem and resume light feeding only when growth warrants it. Keep the pot stable against wind and far enough from walls for airflow. Harvest shoots with a clean tool without pulling branches. Remove yellow leaves but retain healthy foliage that feeds regrowth. If caterpillars appear, hand-pick them or close mesh correctly. At the end, measure total crown and shoot weight, then record the duration between first and final cuts. Replace exhausted mix before another demanding vegetable and rotate plant families.
Bloom and dimensions
Its place,in your garden.
Mature height
About 45 to 75 cm depending on conditions
Width / spread
About 30 to 45 cm
Flower color
Yellow if buds are allowed to open
Foliage color
Green to blue-green; dark-green stems
Foliage type
Large thick veined leaves
Growth rate
Fast; extra-early variety
Growth habit
Upright annual plant, compact then branching after cutting
Fragrance
Mild fresh broccoli flavour
Bloom period
Broccoli is harvested before flowering while green buds are firm and tight. When a head loosens or shows yellow, flowers are approaching and culinary quality declines. Heat and lack of water speed this transition. Inspect crowns frequently and cut without delay. Open yellow flowers may attract insects but indicate a missed harvest rather than the crop goal. Remove overmature heads so side-shoot production can continue where the plant remains healthy.
Fruiting
The variety tolerates bolting well in hot weather and is suitable for spring, summer, and autumn harvests. Harvest the main crown as soon as it is firm and tight, before the florets open. Then inspect the plants every two to three days and pick young side shoots to prolong production. Sibsey F1’s main asset is its ability to turn a first crown into a prolonged harvest.
Days to maturity
85 days after sowing for the first crown
Harvest
Cut the firm, tight crown before opening; continue with tender side shoots for several weeks.
Garden associations
In goodcompany.
Companion plants
Dill, beet, cucumber, pickling cucumber, strawberry, mint, oregano, rosemary, and thyme according to the French W.H. Perron page. Keep them away from the crown to preserve airflow and shoot access. The English page differs slightly and omits some items; the French list tied to the source product is retained. Companion planting complements rotation, mulch, and irrigation but does not replace them. Harvest neighbours without disturbing broccoli roots. Keep tall vines from shading the crown. Keep a clear path for carrying crowns without breaking remaining shoots. Remove companion debris promptly when it blocks airflow.
Recipe idea
From the gardento your plate.
Edible parts
Crown, side shoots, peeled stems, and tender leaves
Prepare lemon-roasted Sibsey broccoli shoots. Rinse approximately 500 g crowns and side stems, drain, then cut pieces to similar thickness. Peel thick stems and slice them. Toss with one tablespoon olive oil, one small minced garlic clove, a pinch of salt, and pepper. Spread in one layer on a clean tray. Roast at 220°C for fifteen to twenty minutes, turning halfway, until edges brown and stems are tender. Add zest and juice from half a lemon after cooking. Serve immediately with pasta, grain, or a main dish. For a milder version, replace garlic with thyme. Refrigerate leftovers within two hours, use a board separate from bare meat, and discard every slimy or mouldy floret before preparation. Label leftovers with the date. Taste before adding more salt and serve stems while hot and crisp. For advance preparation, blanch briefly, cool in clean ice water, drain, and refrigerate before final roasting. Keep bare and cooked utensils separate.
Frequently asked questions
Your questions,answered.
When should Sibsey F1 be sown?
Start indoors four to five weeks before the last frost in clean containers, approximately 6 mm deep. Keep mix moist and provide bright light after emergence. Harden plants before transplanting seven to ten days after the last ground frost. W.H. Perron also allows direct sowing in early May. Then space plants 30 to 45 cm apart and rows 45 to 60 cm apart. For spring, summer, and fall harvests, plan several dates suited to the local season. Label every succession and count the 85-day maturity from the actual sowing date, not transplantation. Protect young plants from abrupt heat and wind during establishment. This method keeps sowing and transplant schedules from being confused in later records.
How many seeds are in the packet and how are they treated?
W.H. Perron packet 65-1496-01N contains approximately 75 seeds. The official listing classifies Sibsey F1 as untreated seed, and Norseco confirms an untreated formulation for the 75-seed packet. No coating or other treatment is stated, and the product is not advertised as organic. Because this is an F1 hybrid, seed collected from the plants will not reliably reproduce Sibsey’s characteristics. Keep the packet closed in a cool, dry place until sowing, then retain its label with your growing notes. Always check the code and quantity printed on the package received because other W.H. Perron broccoli products may have a different count or formulation. Photographing the original label provides useful traceability.
How are side shoots encouraged?
Wait until the main crown is firm, tight, and entirely green. Cut it with a clean knife low enough on the stalk without pulling the plant or damaging its crown. Continue regular watering and maintain balanced nutrition. New shoots will emerge from leaf axils. Inspect them every two or three days and pick while young before buds open. Frequent harvest encourages continuity and preserves tender texture. Remove overmature or diseased stems. Record the number and weight of secondary cuts to evaluate the long yield period that distinguishes Sibsey F1. Clean the knife between any diseased and healthy plant. Continue while shoots remain healthy and tender.
How can bud opening be prevented?
Inspect crowns frequently as 85 days approaches. Harvest as soon as they are firm and tight; do not wait for yellow to appear among buds. Maintain even moisture because drought and heat speed bolting. Sibsey tolerates warm temperatures better than many broccoli varieties, but tolerance does not replace irrigation. Mulch helps stabilize soil. Also avoid excess late nitrogen that promotes unbalanced foliage. After the first cut, apply the same criteria to side shoots. Cool harvests promptly and remove every opened head so care remains focused on tender growth. Record weather when premature opening occurs to improve later sowing dates. Harvest without delay once the crown reaches this firm stage.
Can Sibsey be grown in a container?
Yes. Use at least 25 to 35 L for one plant and choose a deep container with several drainage holes. Fill it with rich, loose, draining mix and place in full sun. Transplant without burying the crown. Water deeply as the surface dries and check daily during heat. Fertilize moderately with balanced feed that includes nitrogen. Protect leaves with loose mesh and inspect often. Harvest the firm crown, then keep the plant growing for side shoots. Rotate the pot if light is uneven, empty the saucer, and support the plant when needed. Label every cut to measure total yield. Clean the container after the annual crop ends.
Wildlife and pets
Life,around your plants.
Supporting wildlife
Buds are harvested before flowering and the product is not grown primarily for wildlife. If several yellow flowers open, they may attract bees and hoverflies, but they signal an overmature head. Avoiding unnecessary insecticides also supports natural enemies of pests. Protect young leaves from caterpillars and browsing animals with physical mesh. Inspect mesh so wildlife is not trapped.
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